The 2011-2016 Ford 3.5L has an inherent design flaw where not all of the OE stud locations are utilized by the OE manufacturer which leads to warped exhaust manifolds, broken exhaust studs and blown manifold gaskets. The cylinder head on Fords 3.5L Gas Ecoboost has threaded holes for 11 exhaust studs to be used, however the OE manifold only utilizes 8 of those stud locations. BD has designed a manifold that not only utilizes all 11 stud locations, but also improves exhaust flow and has improved durability, the way it should have come from the factory. BD's Ford 3.5L exhaust manifolds are made from thicker-walled high silicone ductile iron designed to resist thermal warping. Each kit includes 22 exhaust spacers and 22 class 8.8 studs designed to further improve thermal durability.. The 2011-2016 Ford 3.5L has an inherent design flaw where not all of the OE stud locations are utilized by the OE manufacturer which leads to warped exhaust manifolds, broken exhaust studs and blown manifold gaskets. The cylinder head on Fords 3.5L Gas Ecoboost has threaded holes for 11 exhaust studs to be used, however the OE manifold only utilizes 8 of those stud locations. BD has designed a manifold that not only utilizes all 11 stud locations, but also improves exhaust flow and has improved durability, the way it should have come from the factory. BDs Ford 3.5L exhaust manifolds are made from thicker-walled high silicone ductile iron designed to resist thermal warping. Each kit includes 22 exhaust spacers and 22 class 8.8 studs designed to further improve thermal durability.. Replaces Ford OEM part numbers: BL3Z-9430-B, BL3Z-9430-D, BL3Z-9431-B, BL3Z-9431-D. Replaces Ford OEM Part Numbers/Bl3Z-9430-B/ Bl3Z-9430-D/Bl3Z-9431-B/Bl3Z-9431-D. BD Thick Wall High-Silicon Ductile Cast Iron Resists Thermal Warping. BD Diesel Exhaust Manifold Set - Ford F-150 3.5L Ecoboost 11-16. Suggest optional 1043002 addition parts kit for easier install. BD Exhaust Manifolds Ford F-150 3.5L Ecoboost 2011-2016. Exhaust Manifold; Incl. New Studs/Spacers/Nuts;. Utilize 3 additional exhaust stud locations. EXHAUST MANIFOLDS FORD F150 3.5L 2011-16. 15Mm Longer Exhaust Studs Plus Spacers. New studs, spacers, and nuts included. 15mm longer exhaust studs + spacers. New Studs/Spacers/Nuts Included. Lincoln Navigator 2015-2017. Ford F-150/Lobo 2015-2016. Lincoln Mark LT 2011-2014. Ford Expedition 2015-2017. Ford Transit 2015-2023. EXHAUST MANIFOLD SET. Ford F-150 2011-2016. Exhaust Manifold

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov